1//===-- HexagonISelLowering.h - Hexagon DAG Lowering Interface --*- C++ -*-===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// This file defines the interfaces that Hexagon uses to lower LLVM code into a 10// selection DAG. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_LIB_TARGET_HEXAGON_HEXAGONISELLOWERING_H 15#define LLVM_LIB_TARGET_HEXAGON_HEXAGONISELLOWERING_H 16 17#include "Hexagon.h" 18#include "llvm/ADT/StringRef.h" 19#include "llvm/CodeGen/ISDOpcodes.h" 20#include "llvm/CodeGen/SelectionDAGNodes.h" 21#include "llvm/CodeGen/TargetLowering.h" 22#include "llvm/CodeGen/ValueTypes.h" 23#include "llvm/IR/CallingConv.h" 24#include "llvm/IR/InlineAsm.h" 25#include "llvm/Support/MachineValueType.h" 26#include <cstdint> 27#include <utility> 28 29namespace llvm { 30 31namespace HexagonISD { 32 33 enum NodeType : unsigned { 34 OP_BEGIN = ISD::BUILTIN_OP_END, 35 36 CONST32 = OP_BEGIN, 37 CONST32_GP, // For marking data present in GP. 38 ADDC, // Add with carry: (X, Y, Cin) -> (X+Y, Cout). 39 SUBC, // Sub with carry: (X, Y, Cin) -> (X+~Y+Cin, Cout). 40 ALLOCA, 41 42 AT_GOT, // Index in GOT. 43 AT_PCREL, // Offset relative to PC. 44 45 CALL, // Function call. 46 CALLnr, // Function call that does not return. 47 CALLR, 48 49 RET_FLAG, // Return with a flag operand. 50 BARRIER, // Memory barrier. 51 JT, // Jump table. 52 CP, // Constant pool. 53 54 COMBINE, 55 VSPLAT, // Generic splat, selection depends on argument/return 56 // types. 57 VASL, 58 VASR, 59 VLSR, 60 61 TSTBIT, 62 INSERT, 63 EXTRACTU, 64 VEXTRACTW, 65 VINSERTW0, 66 VROR, 67 TC_RETURN, 68 EH_RETURN, 69 DCFETCH, 70 READCYCLE, 71 PTRUE, 72 PFALSE, 73 D2P, // Convert 8-byte value to 8-bit predicate register. [*] 74 P2D, // Convert 8-bit predicate register to 8-byte value. [*] 75 V2Q, // Convert HVX vector to a vector predicate reg. [*] 76 Q2V, // Convert vector predicate to an HVX vector. [*] 77 // [*] The equivalence is defined as "Q <=> (V != 0)", 78 // where the != operation compares bytes. 79 // Note: V != 0 is implemented as V >u 0. 80 QCAT, 81 QTRUE, 82 QFALSE, 83 VZERO, 84 VSPLATW, // HVX splat of a 32-bit word with an arbitrary result type. 85 TYPECAST, // No-op that's used to convert between different legal 86 // types in a register. 87 VALIGN, // Align two vectors (in Op0, Op1) to one that would have 88 // been loaded from address in Op2. 89 VALIGNADDR, // Align vector address: Op0 & -Op1, except when it is 90 // an address in a vector load, then it's a no-op. 91 OP_END 92 }; 93 94} // end namespace HexagonISD 95 96 class HexagonSubtarget; 97 98 class HexagonTargetLowering : public TargetLowering { 99 int VarArgsFrameOffset; // Frame offset to start of varargs area. 100 const HexagonTargetMachine &HTM; 101 const HexagonSubtarget &Subtarget; 102 103 bool CanReturnSmallStruct(const Function* CalleeFn, unsigned& RetSize) 104 const; 105 106 public: 107 explicit HexagonTargetLowering(const TargetMachine &TM, 108 const HexagonSubtarget &ST); 109 110 bool isHVXVectorType(MVT Ty) const; 111 112 /// IsEligibleForTailCallOptimization - Check whether the call is eligible 113 /// for tail call optimization. Targets which want to do tail call 114 /// optimization should implement this function. 115 bool IsEligibleForTailCallOptimization(SDValue Callee, 116 CallingConv::ID CalleeCC, bool isVarArg, bool isCalleeStructRet, 117 bool isCallerStructRet, const SmallVectorImpl<ISD::OutputArg> &Outs, 118 const SmallVectorImpl<SDValue> &OutVals, 119 const SmallVectorImpl<ISD::InputArg> &Ins, SelectionDAG& DAG) const; 120 121 bool getTgtMemIntrinsic(IntrinsicInfo &Info, const CallInst &I, 122 MachineFunction &MF, 123 unsigned Intrinsic) const override; 124 125 bool isTruncateFree(Type *Ty1, Type *Ty2) const override; 126 bool isTruncateFree(EVT VT1, EVT VT2) const override; 127 128 bool isCheapToSpeculateCttz() const override { return true; } 129 bool isCheapToSpeculateCtlz() const override { return true; } 130 bool isCtlzFast() const override { return true; } 131 132 bool hasBitTest(SDValue X, SDValue Y) const override; 133 134 bool allowTruncateForTailCall(Type *Ty1, Type *Ty2) const override; 135 136 /// Return true if an FMA operation is faster than a pair of mul and add 137 /// instructions. fmuladd intrinsics will be expanded to FMAs when this 138 /// method returns true (and FMAs are legal), otherwise fmuladd is 139 /// expanded to mul + add. 140 bool isFMAFasterThanFMulAndFAdd(const MachineFunction &, 141 EVT) const override; 142 143 // Should we expand the build vector with shuffles? 144 bool shouldExpandBuildVectorWithShuffles(EVT VT, 145 unsigned DefinedValues) const override; 146 147 bool isShuffleMaskLegal(ArrayRef<int> Mask, EVT VT) const override; 148 TargetLoweringBase::LegalizeTypeAction getPreferredVectorAction(MVT VT) 149 const override; 150 151 SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override; 152 void LowerOperationWrapper(SDNode *N, SmallVectorImpl<SDValue> &Results, 153 SelectionDAG &DAG) const override; 154 void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue> &Results, 155 SelectionDAG &DAG) const override; 156 157 const char *getTargetNodeName(unsigned Opcode) const override; 158 159 SDValue LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const; 160 SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const; 161 SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const; 162 SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const; 163 SDValue LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const; 164 SDValue LowerINSERT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const; 165 SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const; 166 SDValue LowerVECTOR_SHIFT(SDValue Op, SelectionDAG &DAG) const; 167 SDValue LowerROTL(SDValue Op, SelectionDAG &DAG) const; 168 SDValue LowerBITCAST(SDValue Op, SelectionDAG &DAG) const; 169 SDValue LowerANY_EXTEND(SDValue Op, SelectionDAG &DAG) const; 170 SDValue LowerSIGN_EXTEND(SDValue Op, SelectionDAG &DAG) const; 171 SDValue LowerZERO_EXTEND(SDValue Op, SelectionDAG &DAG) const; 172 SDValue LowerLoad(SDValue Op, SelectionDAG &DAG) const; 173 SDValue LowerStore(SDValue Op, SelectionDAG &DAG) const; 174 SDValue LowerUnalignedLoad(SDValue Op, SelectionDAG &DAG) const; 175 SDValue LowerUAddSubO(SDValue Op, SelectionDAG &DAG) const; 176 SDValue LowerAddSubCarry(SDValue Op, SelectionDAG &DAG) const; 177 178 SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const; 179 SDValue LowerINLINEASM(SDValue Op, SelectionDAG &DAG) const; 180 SDValue LowerPREFETCH(SDValue Op, SelectionDAG &DAG) const; 181 SDValue LowerREADCYCLECOUNTER(SDValue Op, SelectionDAG &DAG) const; 182 SDValue LowerEH_LABEL(SDValue Op, SelectionDAG &DAG) const; 183 SDValue LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const; 184 SDValue 185 LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv, bool isVarArg, 186 const SmallVectorImpl<ISD::InputArg> &Ins, 187 const SDLoc &dl, SelectionDAG &DAG, 188 SmallVectorImpl<SDValue> &InVals) const override; 189 SDValue LowerGLOBALADDRESS(SDValue Op, SelectionDAG &DAG) const; 190 SDValue LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const; 191 SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const; 192 SDValue LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA, 193 SelectionDAG &DAG) const; 194 SDValue LowerToTLSInitialExecModel(GlobalAddressSDNode *GA, 195 SelectionDAG &DAG) const; 196 SDValue LowerToTLSLocalExecModel(GlobalAddressSDNode *GA, 197 SelectionDAG &DAG) const; 198 SDValue GetDynamicTLSAddr(SelectionDAG &DAG, SDValue Chain, 199 GlobalAddressSDNode *GA, SDValue InFlag, EVT PtrVT, 200 unsigned ReturnReg, unsigned char OperandFlags) const; 201 SDValue LowerGLOBAL_OFFSET_TABLE(SDValue Op, SelectionDAG &DAG) const; 202 203 SDValue LowerCall(TargetLowering::CallLoweringInfo &CLI, 204 SmallVectorImpl<SDValue> &InVals) const override; 205 SDValue LowerCallResult(SDValue Chain, SDValue InFlag, 206 CallingConv::ID CallConv, bool isVarArg, 207 const SmallVectorImpl<ISD::InputArg> &Ins, 208 const SDLoc &dl, SelectionDAG &DAG, 209 SmallVectorImpl<SDValue> &InVals, 210 const SmallVectorImpl<SDValue> &OutVals, 211 SDValue Callee) const; 212 213 SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG) const; 214 SDValue LowerVSELECT(SDValue Op, SelectionDAG &DAG) const; 215 SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const; 216 SDValue LowerATOMIC_FENCE(SDValue Op, SelectionDAG& DAG) const; 217 SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const; 218 219 bool CanLowerReturn(CallingConv::ID CallConv, 220 MachineFunction &MF, bool isVarArg, 221 const SmallVectorImpl<ISD::OutputArg> &Outs, 222 LLVMContext &Context) const override; 223 224 SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg, 225 const SmallVectorImpl<ISD::OutputArg> &Outs, 226 const SmallVectorImpl<SDValue> &OutVals, 227 const SDLoc &dl, SelectionDAG &DAG) const override; 228 229 SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override; 230 231 bool mayBeEmittedAsTailCall(const CallInst *CI) const override; 232 233 Register getRegisterByName(const char* RegName, LLT VT, 234 const MachineFunction &MF) const override; 235 236 /// If a physical register, this returns the register that receives the 237 /// exception address on entry to an EH pad. 238 unsigned 239 getExceptionPointerRegister(const Constant *PersonalityFn) const override { 240 return Hexagon::R0; 241 } 242 243 /// If a physical register, this returns the register that receives the 244 /// exception typeid on entry to a landing pad. 245 unsigned 246 getExceptionSelectorRegister(const Constant *PersonalityFn) const override { 247 return Hexagon::R1; 248 } 249 250 SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) const; 251 SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const; 252 SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG) const; 253 254 EVT getSetCCResultType(const DataLayout &, LLVMContext &C, 255 EVT VT) const override { 256 if (!VT.isVector()) 257 return MVT::i1; 258 else 259 return EVT::getVectorVT(C, MVT::i1, VT.getVectorNumElements()); 260 } 261 262 bool getPostIndexedAddressParts(SDNode *N, SDNode *Op, 263 SDValue &Base, SDValue &Offset, 264 ISD::MemIndexedMode &AM, 265 SelectionDAG &DAG) const override; 266 267 ConstraintType getConstraintType(StringRef Constraint) const override; 268 269 std::pair<unsigned, const TargetRegisterClass *> 270 getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI, 271 StringRef Constraint, MVT VT) const override; 272 273 unsigned 274 getInlineAsmMemConstraint(StringRef ConstraintCode) const override { 275 if (ConstraintCode == "o") 276 return InlineAsm::Constraint_o; 277 return TargetLowering::getInlineAsmMemConstraint(ConstraintCode); 278 } 279 280 // Intrinsics 281 SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const; 282 SDValue LowerINTRINSIC_VOID(SDValue Op, SelectionDAG &DAG) const; 283 /// isLegalAddressingMode - Return true if the addressing mode represented 284 /// by AM is legal for this target, for a load/store of the specified type. 285 /// The type may be VoidTy, in which case only return true if the addressing 286 /// mode is legal for a load/store of any legal type. 287 /// TODO: Handle pre/postinc as well. 288 bool isLegalAddressingMode(const DataLayout &DL, const AddrMode &AM, 289 Type *Ty, unsigned AS, 290 Instruction *I = nullptr) const override; 291 /// Return true if folding a constant offset with the given GlobalAddress 292 /// is legal. It is frequently not legal in PIC relocation models. 293 bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override; 294 295 bool isFPImmLegal(const APFloat &Imm, EVT VT, 296 bool ForCodeSize) const override; 297 298 /// isLegalICmpImmediate - Return true if the specified immediate is legal 299 /// icmp immediate, that is the target has icmp instructions which can 300 /// compare a register against the immediate without having to materialize 301 /// the immediate into a register. 302 bool isLegalICmpImmediate(int64_t Imm) const override; 303 304 EVT getOptimalMemOpType(uint64_t Size, unsigned DstAlign, 305 unsigned SrcAlign, bool IsMemset, bool ZeroMemset, bool MemcpyStrSrc, 306 const AttributeList &FuncAttributes) const override; 307 308 bool allowsMisalignedMemoryAccesses(EVT VT, unsigned AddrSpace, 309 unsigned Align, MachineMemOperand::Flags Flags, bool *Fast) 310 const override; 311 312 /// Returns relocation base for the given PIC jumptable. 313 SDValue getPICJumpTableRelocBase(SDValue Table, SelectionDAG &DAG) 314 const override; 315 316 bool shouldReduceLoadWidth(SDNode *Load, ISD::LoadExtType ExtTy, 317 EVT NewVT) const override; 318 319 // Handling of atomic RMW instructions. 320 Value *emitLoadLinked(IRBuilder<> &Builder, Value *Addr, 321 AtomicOrdering Ord) const override; 322 Value *emitStoreConditional(IRBuilder<> &Builder, Value *Val, 323 Value *Addr, AtomicOrdering Ord) const override; 324 AtomicExpansionKind shouldExpandAtomicLoadInIR(LoadInst *LI) const override; 325 bool shouldExpandAtomicStoreInIR(StoreInst *SI) const override; 326 AtomicExpansionKind 327 shouldExpandAtomicCmpXchgInIR(AtomicCmpXchgInst *AI) const override; 328 329 AtomicExpansionKind 330 shouldExpandAtomicRMWInIR(AtomicRMWInst *AI) const override { 331 return AtomicExpansionKind::LLSC; 332 } 333 334 private: 335 void initializeHVXLowering(); 336 void validateConstPtrAlignment(SDValue Ptr, const SDLoc &dl, 337 unsigned NeedAlign) const; 338 339 std::pair<SDValue,int> getBaseAndOffset(SDValue Addr) const; 340 341 bool getBuildVectorConstInts(ArrayRef<SDValue> Values, MVT VecTy, 342 SelectionDAG &DAG, 343 MutableArrayRef<ConstantInt*> Consts) const; 344 SDValue buildVector32(ArrayRef<SDValue> Elem, const SDLoc &dl, MVT VecTy, 345 SelectionDAG &DAG) const; 346 SDValue buildVector64(ArrayRef<SDValue> Elem, const SDLoc &dl, MVT VecTy, 347 SelectionDAG &DAG) const; 348 SDValue extractVector(SDValue VecV, SDValue IdxV, const SDLoc &dl, 349 MVT ValTy, MVT ResTy, SelectionDAG &DAG) const; 350 SDValue insertVector(SDValue VecV, SDValue ValV, SDValue IdxV, 351 const SDLoc &dl, MVT ValTy, SelectionDAG &DAG) const; 352 SDValue expandPredicate(SDValue Vec32, const SDLoc &dl, 353 SelectionDAG &DAG) const; 354 SDValue contractPredicate(SDValue Vec64, const SDLoc &dl, 355 SelectionDAG &DAG) const; 356 SDValue getVectorShiftByInt(SDValue Op, SelectionDAG &DAG) const; 357 358 bool isUndef(SDValue Op) const { 359 if (Op.isMachineOpcode()) 360 return Op.getMachineOpcode() == TargetOpcode::IMPLICIT_DEF; 361 return Op.getOpcode() == ISD::UNDEF; 362 } 363 SDValue getInstr(unsigned MachineOpc, const SDLoc &dl, MVT Ty, 364 ArrayRef<SDValue> Ops, SelectionDAG &DAG) const { 365 SDNode *N = DAG.getMachineNode(MachineOpc, dl, Ty, Ops); 366 return SDValue(N, 0); 367 } 368 SDValue getZero(const SDLoc &dl, MVT Ty, SelectionDAG &DAG) const; 369 370 using VectorPair = std::pair<SDValue, SDValue>; 371 using TypePair = std::pair<MVT, MVT>; 372 373 SDValue getInt(unsigned IntId, MVT ResTy, ArrayRef<SDValue> Ops, 374 const SDLoc &dl, SelectionDAG &DAG) const; 375 376 MVT ty(SDValue Op) const { 377 return Op.getValueType().getSimpleVT(); 378 } 379 TypePair ty(const VectorPair &Ops) const { 380 return { Ops.first.getValueType().getSimpleVT(), 381 Ops.second.getValueType().getSimpleVT() }; 382 } 383 MVT tyScalar(MVT Ty) const { 384 if (!Ty.isVector()) 385 return Ty; 386 return MVT::getIntegerVT(Ty.getSizeInBits()); 387 } 388 MVT tyVector(MVT Ty, MVT ElemTy) const { 389 if (Ty.isVector() && Ty.getVectorElementType() == ElemTy) 390 return Ty; 391 unsigned TyWidth = Ty.getSizeInBits(); 392 unsigned ElemWidth = ElemTy.getSizeInBits(); 393 assert((TyWidth % ElemWidth) == 0); 394 return MVT::getVectorVT(ElemTy, TyWidth/ElemWidth); 395 } 396 397 MVT typeJoin(const TypePair &Tys) const; 398 TypePair typeSplit(MVT Ty) const; 399 MVT typeExtElem(MVT VecTy, unsigned Factor) const; 400 MVT typeTruncElem(MVT VecTy, unsigned Factor) const; 401 402 SDValue opJoin(const VectorPair &Ops, const SDLoc &dl, 403 SelectionDAG &DAG) const; 404 VectorPair opSplit(SDValue Vec, const SDLoc &dl, SelectionDAG &DAG) const; 405 SDValue opCastElem(SDValue Vec, MVT ElemTy, SelectionDAG &DAG) const; 406 407 bool isHvxSingleTy(MVT Ty) const; 408 bool isHvxPairTy(MVT Ty) const; 409 SDValue convertToByteIndex(SDValue ElemIdx, MVT ElemTy, 410 SelectionDAG &DAG) const; 411 SDValue getIndexInWord32(SDValue Idx, MVT ElemTy, SelectionDAG &DAG) const; 412 SDValue getByteShuffle(const SDLoc &dl, SDValue Op0, SDValue Op1, 413 ArrayRef<int> Mask, SelectionDAG &DAG) const; 414 415 SDValue buildHvxVectorReg(ArrayRef<SDValue> Values, const SDLoc &dl, 416 MVT VecTy, SelectionDAG &DAG) const; 417 SDValue buildHvxVectorPred(ArrayRef<SDValue> Values, const SDLoc &dl, 418 MVT VecTy, SelectionDAG &DAG) const; 419 SDValue createHvxPrefixPred(SDValue PredV, const SDLoc &dl, 420 unsigned BitBytes, bool ZeroFill, 421 SelectionDAG &DAG) const; 422 SDValue extractHvxElementReg(SDValue VecV, SDValue IdxV, const SDLoc &dl, 423 MVT ResTy, SelectionDAG &DAG) const; 424 SDValue extractHvxElementPred(SDValue VecV, SDValue IdxV, const SDLoc &dl, 425 MVT ResTy, SelectionDAG &DAG) const; 426 SDValue insertHvxElementReg(SDValue VecV, SDValue IdxV, SDValue ValV, 427 const SDLoc &dl, SelectionDAG &DAG) const; 428 SDValue insertHvxElementPred(SDValue VecV, SDValue IdxV, SDValue ValV, 429 const SDLoc &dl, SelectionDAG &DAG) const; 430 SDValue extractHvxSubvectorReg(SDValue VecV, SDValue IdxV, const SDLoc &dl, 431 MVT ResTy, SelectionDAG &DAG) const; 432 SDValue extractHvxSubvectorPred(SDValue VecV, SDValue IdxV, const SDLoc &dl, 433 MVT ResTy, SelectionDAG &DAG) const; 434 SDValue insertHvxSubvectorReg(SDValue VecV, SDValue SubV, SDValue IdxV, 435 const SDLoc &dl, SelectionDAG &DAG) const; 436 SDValue insertHvxSubvectorPred(SDValue VecV, SDValue SubV, SDValue IdxV, 437 const SDLoc &dl, SelectionDAG &DAG) const; 438 SDValue extendHvxVectorPred(SDValue VecV, const SDLoc &dl, MVT ResTy, 439 bool ZeroExt, SelectionDAG &DAG) const; 440 441 SDValue LowerHvxBuildVector(SDValue Op, SelectionDAG &DAG) const; 442 SDValue LowerHvxConcatVectors(SDValue Op, SelectionDAG &DAG) const; 443 SDValue LowerHvxExtractElement(SDValue Op, SelectionDAG &DAG) const; 444 SDValue LowerHvxInsertElement(SDValue Op, SelectionDAG &DAG) const; 445 SDValue LowerHvxExtractSubvector(SDValue Op, SelectionDAG &DAG) const; 446 SDValue LowerHvxInsertSubvector(SDValue Op, SelectionDAG &DAG) const; 447 448 SDValue LowerHvxAnyExt(SDValue Op, SelectionDAG &DAG) const; 449 SDValue LowerHvxSignExt(SDValue Op, SelectionDAG &DAG) const; 450 SDValue LowerHvxZeroExt(SDValue Op, SelectionDAG &DAG) const; 451 SDValue LowerHvxCttz(SDValue Op, SelectionDAG &DAG) const; 452 SDValue LowerHvxMul(SDValue Op, SelectionDAG &DAG) const; 453 SDValue LowerHvxMulh(SDValue Op, SelectionDAG &DAG) const; 454 SDValue LowerHvxSetCC(SDValue Op, SelectionDAG &DAG) const; 455 SDValue LowerHvxExtend(SDValue Op, SelectionDAG &DAG) const; 456 SDValue LowerHvxShift(SDValue Op, SelectionDAG &DAG) const; 457 458 SDValue SplitHvxPairOp(SDValue Op, SelectionDAG &DAG) const; 459 SDValue SplitHvxMemOp(SDValue Op, SelectionDAG &DAG) const; 460 461 std::pair<const TargetRegisterClass*, uint8_t> 462 findRepresentativeClass(const TargetRegisterInfo *TRI, MVT VT) 463 const override; 464 465 bool isHvxOperation(SDValue Op) const; 466 SDValue LowerHvxOperation(SDValue Op, SelectionDAG &DAG) const; 467 468 SDValue PerformHvxDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const; 469 }; 470 471} // end namespace llvm 472 473#endif // LLVM_LIB_TARGET_HEXAGON_HEXAGONISELLOWERING_H 474